The most improved package of the AVLock series. This Delphi component let you to convert your application to time limited trial in a very easy way!! Rent your software sending a new Registration Keys for each new period. Manage up to 254 extra modules. Two lock strategies; install code based and use...

hxxp://www.programmersheaven.com/zone2/cat930/39496.htm
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I have some prog that was protected with this (freeware version), but sometimes i start the prog that says: "Please remember, this is a free version only for not commercial use."
this massage is not beautifully.